Door for furnaces, &amp;c.



PATENTED JUNB'M, 1904.

J. H. SILLEY. DOOR FOR FURNAGBS, &0.

APPLICATION FILED OCT. 23. 1903. K0 MODEL.

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PATBNTED JUNE 14, 1 904.

J. H. SILLBY. DOOR FOR FURNACES, 65p. APPLICATION FILED-001. 23. 1903. Q

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UNITED STATES Patented June 14, 1904.

PATENT OFFICE.

JOHN HENRY SILLEY, OF LONDON, ENGLAND.

pooR FOR FURNACES, ate.

SPECIFICATION forming part of Letters Patent No. 762,850, dated June 14,1904..

Application filed October 23, 1903.

To (LZZ 1071,0171 it vnnt concern:

Be it known thatI, JOHN HENRY SILLEY, of London, England, have inventeda new and usefulImprovement in Smoke-Box, Furnace, and other Doors forBoilers and the Like, of which the following is a specification.

This invention relates to smoke-box, furnace, and other doors forboilers and the like, and has for its object the provision of means forquickly and readily fastening the, said doors in their closed positionso that they are supported around their edges in such a way that theymake a tight joint upon the smokebox, furnace front or casing to whichthey are attached and on which they bear.

Considerable difliculty has been experienced in the past in maintainingsmoke-box and furnace doors tight and in working condition on boilersworking under natural, induced, or forced draft, owing to the bucklingof the doors and casings when subjected to airpressure and hightemperature, and by this invention I entirely overcome the abovedisadvantages.

To carry this invention into effect, I arrange upon the casing aseriesof hooks or clutches around the parts adjacent to the edges of thedoor, and close to each series of catches I mount a device adapted toswivel in bearings and at the same time have a sliding movement in thedirection of its axis. This device carries a series of wedge-fastenersof the same number as there are hooks or catches in that. particularseries. I construct the device of a girder formation, such as ofangle-iron section or other section having transverse stiffness, so asto give a continuity of support to the edge of the door. One simplemethod of construction of the wedge-fasteners is by cutting a series ofnotches having inclined faces out of the web of the angle-iron, theinclined faces of which are adapted to engage with the hooks or catches.The fastening device and the hooks or catches may be both on the casing,or one may be on the door and the other on the casing, the onlyessential feature being that when they coact the door and easing arebrought into intimate contact with one another. \Vhen the door isfastenedand it is open.

desired to open it, the device is slid up in its Serial No- 178,259. (Nomodel.)

bearings in an axial direction, so as to disengage the inclined faceswith the hooks or catches, and is then turned about its axis, so as toclear the catches and allow the door to In order that the invention maybe the better understood, I will now proceed to describe the same inrelation to the accompanying drawings, reference being had to theletters marked thereon."

Like letters refer to like parts in the various figures.

Figure 1 is a perspective view of the sliding fastening device whichforms the essential part of my invention. Fig. 2 is aview of thesmoke-box door mounted on a vertical axis and provided with my fasteningdevice on all four sides. Fig. 3 is a'simil'ar view of the door mountedon the horizontal axis having my invention applied to three of itssides. Fig. 4: is a view of the furnace-door with my invention appliedthereto. Fig. 5 is a part sectional view of the device applied to asmokebox door in its fastened position. Fig. 6 is a front elevation ofthe same. Fig. 7 is a view of Fig. 5, showing the device drawn back fromengagement with the hooks or catches, but not turned over. Fig. 8 is aview of the device turnedover, showing thedoor ready for opening. Fig. 9is an enlarged sectional view of the device and the catches on the linea o of Fig. 6. Fig. 10 is an enlarged sectional view of the same on theline w 00 of Fig. 7 Fig. 11 is an enlarged sectional view of. the sameon the line y z of Fig. 8. Figs, 12, 13, 14:, and 15 are various viewsof the brackets on which the device slides.

Referring now to Fig. 1, it will be noticed that the fastening device aconsists of an angleiron having inclined surfaces 1) and spindles c. Itis also provided with a handle (Z, by which its operation is effected,while a notch c is made in the web of the angle-iron to permit of thewhole device being swung about the axis of the spindles 0 clear of thehooks or catches. The spindles c are inserted into Fig. 3 two of thesaid devices a and their brackets fare mounted on the door at the sidesand at the bottom device a withits brackets f is mounted on the casing,and in Fig. 4, which illustrates a furnace-door, the device a and itsbrackets f are mounted on the furnace front or casing. The device a isso mounted in its brackets f that it can slide longitudinally in thedirection of the axis of the spindles 0. Adjacent to the edges of thedoor hooks or catches g are mounted on the casing, these catches havinga projecting lip or ledge under which the inclined faces 6 on the devicea engage.

Referring now to Figs. 5, 6, 7, and 8, it will be noticed that when thedevice a is slid down so that the inclined surfaces 5 engage with thehooks or catches g the door is forced into close contact with thesurfaces of the casing on which it rests, and the stiffness of thevertical web of the angle-iron-section girder serves to give supportwith great transverse rigidity to the door. When it is desired to openthe door, the device a is slid back longitudinally, so that the inclinedportions 6 become disengaged from the hooks g, as shown in Fig. 10, andthe device a can now be turned upon the axis of the spindles 0, so as tobe quite clear of the hooks g, as shown in Fig. 11, when the door can beopened. It will be noticed in reference to Figs. 12, 13, 14, and 15 thatthe brackets fare provided with an extension it, which serves as a stopto prevent any sliding of the device a in the brackets f at any otherposition than that in which the device a is to be slid axially in orderto lock or unlock the door. This action is effected by the end of theangleiron 1' when the turning of the device atakes place abuttingagainst the end of the portion it of the brackets f, the undercutportions of the extension h allowing of the sliding of the device whenit has been turned into its proper position for sliding engagement. Theinclined faces 5 and the surfaces of the hooks or catches g, with whichthey engage, are given an inclination transverse to their length, asshown in Figs. 9, 10, and 11, so as to form a dovetail locking effect inorder to prevent the device a from being forced out of engagement fromthe hooks or catches g.

I/Vhat I claim as my invention, and desire to secure by Letters Patent,is

1. In a casing, a door, a sliding device of great transverse rigiditycarried by one of said parts adapted to give continuity of support alongthe edge of the door, aseries of catches mounted on the casing, saidsliding devices having inclined surfaces arranged to engage with thesaid catches so as to force the door and casing into close contact,substantially as described.

2. In a casing, a door, brackets mounted on one of said parts, a seriesof catches on the casing, and a device of great transverse rigidityadapted to slide and be rotated in the brackets and having inclinedsurfaces alongi-ts length slidingly engaging with the said catches so asto force the door and easing into close contact, substantially asdescribed.

In witness whereof I have hereunto set my hand in presence of twowitnesses.

JOHN HENRY SILLEY.

Witnesses:

RICHARD A. HOFFMANN, CHARLES CARTER.

